Structure matters - Lab Report Example

It involved manual pulling of the paper strips to find out the amount of force needed to tear the paper. Some paper strips were soaked with water and the same tensile strength test conducted. It was noted that the dry paper strips require far much force to tear apart than those soaked in water. Among the dry paper strips, the strips with shorter width required much force unlike those with longer widths. The demand placed on pulp industry makes paper and paper board testing an important step in the in the production process of paper before release for use in the wide range of applications.

The tensile strength and elongation of the produced paper must meet customer requirement especially those used in printing. The tensile breaking strength of board and paper is usually achieved by measuring the stretch and breaking load of paper strips. The provided sheet of paper was measured and five of 3/8” by 3” strips were made through the use of scissors both from the top left comer of the sheet and the bottom right corner. The strips made from the top corner were kept separate from those made from the bottom right corner.

The amount of force required to pull the strips apart were rated form a scale of one to ten with one assigned to the strips that required the least amount of force while ten assigned to strips that required the maximum force. From the firs experiment it was evidenced that pulling the strips cut from the bottom left corner of the sheet required a lot of force to be exerted in order to tear the strip a part. The force needed to get the strips torn was rated 8 out of ten. On the other hand, the strips made from the top of the paper required much less force as compared to the other strips.

The force required to get the strips torn was rated 5 out of ten. The strips made from the bottom right corner of the paper had a shorter width of 3/8” with a longer length of 3”.